JPH08146538A - Image recording device - Google Patents

Abstract

PURPOSE: To provide an image recording device recording an image corresponding to digital image data on a photosensitive medium such as a photographic film with sufficient resolution. CONSTITUTION: This image recording device is provided with a disk 2 capable of being rotated around the center shaft and having a photosensitive medium provided on a first main face and a spiral track formed on a second main face, a rotationally driving means 10 connected to the center shaft and rotating the disk, a supporting body structure 12 having first and second supporting parts 14, 16 respectively arranged in the vicinty of the first and second main faces and capable of being rectilinearly moved in the radial direction of the disk, a rectilinearly driving means 24 rectilinearly driving the supporting body structure in the radial direction of the disk, an image recording means 18 provided on the first supporting part and irradiating a light corresponding to image data to the photosensitive medium so as to record the image, an optical position detecting means 20 provided on the second supporting part and optically detecting positional relation against the spiral track, and a control means 22 controlling the rectilinearly driving means and the rotationally driving means according to the output of the optical position detecting means.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image recording apparatus suitable for recording an image on a photosensitive medium such as a photographic film based on image data.

[0002]

2. Description of the Related Art With the recent development of digital image processing technology, an image is read by a high resolution scanner, converted into digital image data and stored in a memory, and various operations and processes are performed. Sometimes. Also,
Various images are created by digital data by computer graphics technology. A color printer for a computer is generally used to print such image data on a recording medium, but the resolution of the print output is about 1200 DPI at the most. This resolution is far below the resolution (3000 DPI or more) required as a source image in the still image publishing industry. A photographic film is generally used as a recording medium for still images, and it is desirable to record an image based on image data on the photographic film. For this reason, high resolution C
It is possible to display it on the RT and shoot it with a camera, but even with a high resolution CRT it is not possible to display it at the extremely high resolution required by the printing and publishing industry, so even if you take a picture of it the resolution will be high. Is insufficient.

Therefore, it is an object of the present invention to provide an image recording apparatus for recording an image corresponding to digital image data on a photosensitive medium such as photographic film with sufficient resolution.

[0004]

The image recording apparatus of the present invention comprises:
A disk that is rotatable about a central axis, has a photosensitive medium on the first main surface, and has a spiral track formed on the second main surface, and is connected to the central axis to rotate the disk. And a support structure that has linear drive movement in the radial direction of the disc and that has a first and second support portion respectively disposed near the first and second main surfaces of the disc. Linear driving means for linearly driving the structure in the radial direction of the disk; image recording means provided on the first support portion for irradiating the photosensitive medium with light according to image data to record an image; (2) Optical position detecting means provided on the support portion for optically detecting the positional relationship with the spiral track, and controlling the linear driving means and the rotary driving means according to the output of the optical position detecting means. And control means.

[0005]

It is possible to record a high-resolution image on the photosensitive medium on the disk by rotating the disk and tracing the spiral track of the disk while moving the support structure in the radial direction of the disk. This is because the accuracy of the spiral track formed on the lower surface of the disk is extremely high, and the linear drive means can be precisely controlled with reference to the highly accurate track.

[0006]

FIG. 2 is a perspective view showing the structure of the main part of the image recording apparatus according to the present invention. The disk 2 is rotatably supported around a central axis 4, and four photographic films 6 which are photosensitive media for image recording are stuck on the upper surface of the disk 2. A spiral track is engraved on the lower surface of the disk 2. This spiral track is a copy of a master disk track formed by laser cutting in a well-known mass-production process, and is equivalent to that formed on the surface of a well-known compact disc, laser disc, or the like. It is a thing. This spiral track has extremely high precision and can engrave a digital signal on a convex portion between adjacent tracks. An interval (track pitch) between adjacent tracks of the spiral track is, for example, about 1.6 μm (micron). Therefore, assuming that the image is recorded in correspondence with the track pitch interval, theoretically, the image can be recorded at a resolution of 15000 dots (15000 DPI) or more per inch (2.54 cm). A spindle motor 10 is connected to the central shaft 4, and the rotational driving force of the motor causes the disk 2 to rotate around the central shaft. The support structure 2 is supported so as to be linearly movable in the radial direction of the disk 2. This support structure 12
Has two arm-shaped supporting portions 14 and 16, and the upper first supporting portion 14 is an image recording portion 18 for optically recording an image based on a digital image on the photographic film 6 (see FIG. 1). Is provided. In addition, in the lower second support portion 16,
A position detector 20 (see FIG. 1) for tracing a spiral track on the lower surface of the disk 2 is provided.

FIG. 1 is a block diagram schematically showing the configuration of the apparatus shown in FIG. 2 when viewed from the side. Elements corresponding to those in FIG. 2 are designated by the same reference numerals. An image recording section 18 is provided on the first support section 14 of the support structure 12, and
A position detector 20 is provided on the upper end of the support 16. The image recording unit 18 irradiates the photographic film 6, which is a photosensitive medium, with light for writing an image based on the image data supplied from the control unit 22, and records an image. The position detector 20 also includes a known optical pickup for tracing a spiral track on the lower surface of the disk 2. This optical pickup irradiates a spiral beam on the lower surface of the disk 2 with a laser beam and detects the reflected light to supply a signal for accurate tracing to the control unit 22. The control unit 22 controls the spindle motor 10 for rotating the disk 2 and also controls the sliding motor 24 for linearly driving the support structure 12. The rotation shaft of the slide motor 24 is connected to a slide mechanism screw 26, and the slide mechanism screw 26 is engaged with the support structure 12. The structure of the support structure 12 linearly moves along the radial direction of the disk 2 in accordance with the rotation of the slide motor 24. Since such a linear movement control mechanism is well known, its details are not shown.

Since the mechanical precision of the slide control mechanism including the slide mechanism screw 26 does not need to be so high, the manufacturing cost can be greatly reduced. This is because the control unit 22 servo-controls the sliding motor 24 so as to trace the accurate spiral track on the lower surface of the disk 2. Such an accurate servo control mechanism is a technique well known to those skilled in the art with respect to a drive control mechanism for an optical pickup such as a compact disc device, and a detailed description thereof is omitted because it is not directly related to the present invention.

Further, when the control unit 22 controls the spindle motor 10 according to the output signal from the position detection unit 20, the linear velocity of rotation of the disk 2 at the trace position of the position detection unit 20 is kept constant. I am trying to become. This is because rotation control information (for example, bit clock information) corresponding to a predetermined frequency is inserted between spiral tracks carved on the surface of the disk 2, and this rotation control information is read out, and the frequency is always Accurate servo control is performed so as to maintain a predetermined value. Such constant linear velocity control is also a well-known technique that is commonly used in compact disc devices and the like, and the details thereof are not directly related to the present invention, and therefore will be omitted.

FIG. 3 schematically shows a side view of the configuration of another embodiment according to the present invention. Each part corresponding to the device of FIG. 1 has the same reference number. The difference from the device of FIG. 1 is that a second disk 8 is further provided, a spiral track is formed on the upper surface of this second disk, and a position detection unit is provided below the second support 16 of the support structure 12. 20 is provided. Of course, in this embodiment, there are no spiral tracks on the lower surface of the first disc 2. Since the first disk 2 and the second disk 8 rotate coaxially about the common rotation axis 4, there is substantially no difference in operation from the apparatus of FIG. However, with such a configuration, the first disc to which the photographic film 6 as the photosensitive medium is attached and the second disc on which the spiral track for position tracing is formed are separated from each other. There is no risk of damaging the spiral track when removing the photographic film 6 from the 4 and replacing the photographic film 6, which simplifies handling.

FIG. 4 is a block diagram showing the configuration of an embodiment of the image recording section 18 shown in FIGS. 1 and 3. Image data is supplied from a control unit 22 such as a computer to a digital / analog converter (DAC) 40 and converted into an analog signal. The image data includes three color component data of red (R), green (G), and blue (B), and each color component data is converted into an analog signal. The color component signals, which are analog signals, are separately supplied to the corresponding color component light sources 42, 44, and 46, respectively. These light sources 42, 44 and 46 are
Light emitting diode that outputs the light of the color corresponding to each color component
(LED) is included. The red (R), green (G) and blue (B) three primary color lights output from these light sources 42, 44 and 46 are optically combined to form a small spot on the photographic film 6 to form an image. To record. In this embodiment, the output light from the light sources 42, 44 and 46 are combined by dichroic mirrors 48 and 50 and passed through a condenser lens 52, a slit 54, a collimator lens 56 and a focusing lens 58. The photographic film 6 is irradiated. The optical system is not limited to the configuration described above, and any other configuration may be adopted.

In FIG. 4, the image data supplied from the control unit 22 is not the image data itself stored in a normal memory, but a predetermined address conversion process is performed. When the image recording unit 18 records an image on the photographic film 6, the imaging spot scans the photographic film 6, and its scanning locus is a concentric locus based on the center of rotation of the disc 2. Becomes Therefore, since the correct image cannot be recorded with the data read from the normal image memory in the order of addresses, it is necessary to read the image data from the image memory in the order corresponding to the scanning locus on the photographic film 6. The address conversion process for reading the data at this time is performed by measuring the size of each part of the apparatus, the rotation speed, the size of the photographic film 6, the resolution of the image data,
It is predetermined from parameters such as the pitch of the spiral track. This makes it possible to record an extremely high-resolution full-color image based on the image data on the photographic film 6, which is a photosensitive medium.

FIG. 5 is a diagram showing an embodiment of the position detecting section 20 of the apparatus shown in FIGS. Laser diode (L
The output light of D) 70 is reflected by a beam splitter 76 via a lens 72 and a diffraction grating (grating) 74, and is irradiated to a track portion 80 engraved on the second disk via an objective lens 78. The light beam emitted from the objective lens 78 is separated by the action of the diffraction grating 74 into one main beam that irradiates the center of the track and two auxiliary beams that irradiate both sides of the track. The reflected light of the main beam is used to control the focus, and the reflected light of the auxiliary beam is used to accurately trace the track. These reflected beams enter the photodetector 84 via the objective lens 78, the beam splitter 76 and the focusing lens 82. In the photodetector 84, the central portion is for main beam detection, and the other two are for auxiliary beam detection. The optical pickup having the above structure realizes a well-known method called the three spots method, and is a method adopted in a normal compact disc device, a laser disc device, or the like. Further detailed description will be omitted.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the embodiments described herein, and various modifications and modifications can be made as necessary without departing from the gist of the present invention. It will be apparent to those skilled in the art that changes can be made.

[0015]

The image recording apparatus of the present invention can record an image based on digital image data on a photosensitive medium such as a photographic film at an extremely high resolution that cannot be realized by the conventional method. Therefore, it can be sufficiently used and is extremely useful even in the case of greatly enlarging a photographic film on which a still image is recorded.

[Brief description of drawings]

FIG. 1 is a side view showing the configuration of an embodiment of the present invention.

FIG. 2 is a perspective view showing a configuration of a main part of the apparatus shown in FIG.

FIG. 3 is a side view showing the configuration of another embodiment of the present invention.

FIG. 4 is a block diagram showing a configuration of an embodiment of an image recording unit of the apparatus of FIGS. 1 and 3.

5 is a schematic diagram showing a configuration example of a position detection unit of the apparatus of FIGS. 1 and 3. FIG.

[Explanation of symbols]

 2 disk 4 rotating shaft 6 photosensitive medium (photographic film) 8 second disk 10 rotation driving means (spindle motor) 12 support structure 14 first supporting portion 16 second supporting portion 18 image recording means 20 optical position detecting means 24 linear driving Means (slide motor) 26 Slide mechanism screw

Claims (4)

[Claims] 1. A disk, which is rotatable about a central axis, has a photosensitive medium provided on a first main surface, and has a spiral track formed on a second main surface, and is connected to the central axis. A rotary drive means for rotating the disc, and first and second support portions respectively arranged near the first and second main surfaces of the disc, and a support capable of linearly moving in the radial direction of the disc. An image recording device for recording an image by irradiating the photosensitive medium with light according to image data, which is provided in the first support portion, and a linear drive means for linearly driving the support structure in a radial direction of the disk. Means and an optical position detecting means provided on the second supporting portion for optically detecting a positional relationship between the spiral track and the linear track, and the linear driving means and the rotation according to the output of the optical position detecting means. Control means for controlling the driving means An image recording device comprising: 2. The spiral track of the disk contains rotation control information, and the control means controls the rotation drive means so as to keep the linear velocity of the disk constant according to the rotation control information. The image recording apparatus according to claim 1, wherein: 3. The image recording means includes a first light source that emits light corresponding to red component data of the image data, a second light source that emits light corresponding to green component data of the image data, and the image data. And a third light source for generating light corresponding to the blue component data, and a color image is recorded on the photosensitive medium by the output light from the first, second and third light sources. The image recording device according to 1 or 2. 4. A first disk rotatable about a common central axis and having a photosensitive medium on one main surface, and a first disk rotatable about the common central axis and spiral on one main surface. A second disk having a circular track, a rotary drive means connected to the common central axis to rotate the first and second disks coaxially, and a first support part near the main surface of the first disk. And a support structure having a second support portion near the one main surface of the second disk and linearly movable in the radial direction of the first and second disks, and the support structure including the first and second support structures. 2 linear driving means for linearly driving in the radial direction of the disk, image recording means provided on the first supporting portion for irradiating the photosensitive medium with light according to image data to record an image, and the second supporting means. And the positional relationship with the spiral track. An image recording apparatus comprising: an optical position detecting means for optically detecting the engagement; and a control means for controlling the linear driving means and the rotational driving means according to the output of the optical position detecting means.